Max Kazantsev f0c38d90c7 [SCEV][NFC] Introduces expression sizes estimation ... This patch introduces the field `ExpressionSize` in SCEV. This field is calculated only once on SCEV creation, and it represents the complexity of this SCEV from arithmetical point of view (not from the point of the number of actual different SCEV nodes that are used in the expression). Roughly saying, it is the number of operands and operations symbols when we print this SCEV. A formal definition is following: if SCEV `X` has operands `Op1`, `Op2`, ..., `OpN`, then Size(X) = 1 + Size(Op1) + Size(Op2) + ... + Size(OpN). Size of SCEVConstant and SCEVUnknown is one. Expression size may be used as a universal way to limit SCEV transformations for huge SCEVs. Currently, we have a bunch of options that represents various limits (such as recursion depth limit) that may not make any sense from the point of view of a LLVM users who is not familiar with SCEV internals, and all these different options pursue one goal. A more general rule that may potentially allow us to get rid of this redundancy in options is "do not make transformations with SCEVs of huge size". It can apply to all SCEV traversals and transformations that may need to visit a SCEV node more than once, hence they are prone to combinatorial explosions. This patch only introduces SCEV sizes calculation as NFC, its utilization will be introduced in follow-up patches. Differential Revision: https://reviews.llvm.org/D35989 Reviewed By: reames llvm-svn: 351725		2019-01-21 06:19:50 +00:00
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ADT	Replace llvm::isPodLike<...> by llvm::is_trivially_copyable<...>	2019-01-20 21:19:56 +00:00
Analysis	[SCEV][NFC] Introduces expression sizes estimation	2019-01-21 06:19:50 +00:00
AsmParser	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
BinaryFormat	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Bitcode	Replace llvm::isPodLike<...> by llvm::is_trivially_copyable<...>	2019-01-20 21:19:56 +00:00
CodeGen	Add missing test file	2019-01-20 21:24:05 +00:00
DebugInfo	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Demangle	Update more file headers across all of the LLVM projects in the monorepo	2019-01-19 10:56:40 +00:00
ExecutionEngine	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
FuzzMutate	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
IR	Replace llvm::isPodLike<...> by llvm::is_trivially_copyable<...>	2019-01-20 21:19:56 +00:00
LineEditor	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Linker	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MC	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
MI	MachineModuleInfo: Store more specific reference to LLVMTargetMachine; NFC	2018-11-05 23:49:13 +00:00
Object	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ObjectYAML	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Option	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
OptRemarks	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Passes	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
ProfileData	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Support	Replace llvm::isPodLike<...> by llvm::is_trivially_copyable<...>	2019-01-20 21:19:56 +00:00
Target	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
TextAPI	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
tools	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
Transforms	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
XRay	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00
CMakeLists.txt	[llvm-tapi] initial commit, supports ELF text stubs	2018-12-03 19:30:52 +00:00
unittest.cfg.in	Add support for unittest inputs.	2018-09-05 23:30:17 +00:00